EP0287941A1 - Method of stiffening a chassis made of metal, especially the bodywork of a private car - Google Patents

Method of stiffening a chassis made of metal, especially the bodywork of a private car Download PDF

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Publication number
EP0287941A1
EP0287941A1 EP88105903A EP88105903A EP0287941A1 EP 0287941 A1 EP0287941 A1 EP 0287941A1 EP 88105903 A EP88105903 A EP 88105903A EP 88105903 A EP88105903 A EP 88105903A EP 0287941 A1 EP0287941 A1 EP 0287941A1
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EP
European Patent Office
Prior art keywords
chassis
cavity
synthetic resin
plastic
material web
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Granted
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EP88105903A
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German (de)
French (fr)
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EP0287941B1 (en
Inventor
Harry Apprich
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Individual
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Individual
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Priority claimed from DE19873713302 external-priority patent/DE3713302A1/en
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Priority to AT88105903T priority Critical patent/ATE70792T1/en
Publication of EP0287941A1 publication Critical patent/EP0287941A1/en
Application granted granted Critical
Publication of EP0287941B1 publication Critical patent/EP0287941B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material

Definitions

  • the invention relates to a method for stiffening the metallic chassis, in particular the floor assembly of passenger cars.
  • the invention has for its object to provide a novel method for stiffening passenger cars that does not require a roof structure, roll bar or the like.
  • Fig. 1 the inside of a metallic chassis 1, in particular the floor pan 2 for a passenger car is shown in the form of a convertible.
  • the entire inside is, cf. also the sectional view according to FIG. 2, covered with a stiffening covering 3, which makes it possible to dispense with the roof construction or a roll bar otherwise prescribed for passenger cars.
  • the stiffening covering is applied in the following way: First, the inside of the chassis, which may have been cleaned beforehand, is coated with an absorbent, textile material, for example a woven, knitted or knitted material or a fleece.
  • the textile material can consist of aramid, polyester, polyamide, carbon and / or glass fiber, that is to say in particular also comprise a mixture of such fibers.
  • a flowable, hardenable synthetic resin Epoxy, polyester or polyurethane resins are suitable.
  • the impregnated textile material is then positively pressed onto the inner surface structure of the chassis while exerting pressure, so that it firmly connects to it, whereby the resin impregnation can also cause the impregnated textile material to bond to the surface of the chassis, which is prepared accordingly for this purpose, in particular can be coated.
  • the synthetic resin in the textile material is allowed to harden under pressure, thereby stiffening the entire chassis.
  • the pressure exerted on the resin-impregnated material is advantageously carried out in the following manner: the chassis, in particular laterally sealed in the door area and filled with the resin-impregnated textile material on the inside, is filled with a preferably aqueous suspension of sand, mud or the like and left apply pressure to the top of this suspension by means of a flat pressure pad, the pressure pad being supported by a corresponding frame on its side opposite the suspension. Due to the pressure generated in this way, the synthetic resin-impregnated textile material fits positively on the surface of the chassis.
  • the curing of the synthetic resin is preferably also carried out under pressure.
  • the fibers of the material can be chemically impregnated.
  • the impregnation, exertion of pressure and curing of the synthetic resin in the textile material can take place at elevated or at room temperature, depending on the type of resin used.
  • the hardened plastic in the textile material can be tempered at elevated temperature.
  • the method described is primarily suitable for stiffening convertibles in which a roll bar is to be eliminated. In general, however, the method described is suitable for stiffening the chassis in all passenger cars, although primarily those without a stiffening roof structure are intended, for example the convertible 5 shown in FIG. 3.
  • an intermediate layer can be introduced between the resin-impregnated material and the chassis, for example in the following way:
  • the inside of the chassis is covered with a fleece or felt layer of 1 to 2 mm thickness before the textile material is introduced.
  • the textile material is then applied and the process continues as described above.
  • the covering formed by the textile material and the resin is removed from the mold and removed from the chassis.
  • an adhesive is introduced, optionally after applying an adhesive base to the stiffening covering and / or the inside of the chassis, which takes the place of the fleece or felt layer.
  • the textile material soaked in resin is then used again.
  • a polyurethane adhesive (one-component adhesive) can be used as the adhesive.
  • This adhesive is selected according to the desired degree of stiffening of the chassis, with an appropriately elastic and appropriately soft or hard adhesive being selected. This allows the degree of stiffening to be controlled within wide limits.
  • the method described above is essentially suitable for exposed, easily accessible surfaces of the chassis, in particular in the underbody of the motor vehicle. Methods are described below which are designed such that they are also suitable for cavities in the motor vehicle chassis, that is to say in particular for cavities in the area of the sill, for A, B and C pillars in the door area, for cardan tunnels and the like .
  • FIG. 4 shows the inside of a metallic chassis 11, in particular the floor assembly 12 for a passenger car in the form of a convertible.
  • the entire inside is covered with a plastic-impregnated, stiffening material web 13.
  • the chassis 11 has cavities, for example a cavity 14 running essentially horizontally and parallel to the longitudinal axis of the chassis in the area of the rocker panel, two approximately vertical cavities 15 in the area of the A-pillar and a cavity 16 which is open at the bottom in the area of the Cardan tunnels on.
  • cavities can also be provided elsewhere, for example in the area of B and C pillars. These cavities are open on at least one, preferably two end faces and are therefore accessible from the outside.
  • This method can be applied to all around closed cavities that are open at both ends, such as the cavity 14 in the sill area. Cavities open only on one end face can be lined with the material web 17 in this way. Cavities open on one side, such as the cardan tunnel 16, can also be lined internally in this way.
  • the width of the material web 17 is dimensioned such that the edges lie flush against one another.
  • the edge regions of the material web 17 in the cavity to be lined can also overlap completely or partially. This does not affect the degree of stiffening, but rather increases it.
  • the plastic-impregnated material web 17 with bumps and the like will firmly adhere to the inside of the cavity 14. If necessary, an adhesive can also be applied before the material web is introduced.
  • the textile material web 17 can consist of aramid, polyester, polyamide, carbon and / or glass fibers. It can be woven, knitted or knitted. The fibers of the textile material web can also be chemically impregnated to increase their absorbency in relation to the plastic that penetrates them.
  • the flowable synthetic resins with which the material web 17 is impregnated are primarily epoxy, polyester or polyurethane resins.
  • the application of pressure with the aid of the hose 18 to the plastic-impregnated material web 17 and / or the curing of the plastic can be carried out at room temperature or at an elevated temperature.
  • the hardened synthetic resin can then also be annealed at elevated temperature.
  • the inflatable tube 18 can be dispensed with.
  • the hose will replaced by a mass of expanding plastic which, during its expansion, unrolls the material web 17 in the same manner as the hose 18 above and presses it positively against the inner surfaces of the cavity under pressure.
  • a mass of expanding plastic which, during its expansion, unrolls the material web 17 in the same manner as the hose 18 above and presses it positively against the inner surfaces of the cavity under pressure.
  • a plastic foam is primarily an expanding plastic. In contrast to the hose 18, the plastic foam remains inside the material web lining the cavity.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

A process for reinforcing the chassis of passenger cars, in particular the underbody including hollow spaces, includes the following steps: the interior of the chassis is coated with an absorbent textile material; this material is impregnated with a free-flowing synthetic resin; the impregnated material is applied under pressure to the internal surface of the chassis of which it follows the contours; and the synthetic resin is allowed to cure under pressure in the textile material.

Description

Die Erfindung betrifft ein Verfahren zum Versteifen des metallischen Chassis, insbesondere der Bodengruppe von Personenkraftwagen.The invention relates to a method for stiffening the metallic chassis, in particular the floor assembly of passenger cars.

Personenkraftwagen werden bisher über ihre Dachkonstruk­tion versteift. Bei sogenannten Coupes und Kabrioletts, die kein starres Dach haben, erfolgt die Versteifung über einen sogenannten "Überrollbügel". Abgesehen von der unbefreidigenden Ästhetik eines solchen Bügels am Kabriolett behindert der Bügel auch den Freiraum über dem Fahrzeug.So far, passenger cars have been stiffened via their roof structure. In so-called coupes and convertibles that do not have a rigid roof, the stiffening takes place via a so-called "roll bar". Apart from the inevitable aesthetics of such a bracket on the convertible, the bracket also hinders the space above the vehicle.

Der Erfindung liegt die Aufgabe zugrunde, ein neuartiges Verfahren zum Versteifen von Personenkraftwagen anzu­geben, das ohne Dachkonstruktion, Überrollbügel oder dergleichen auskommt.The invention has for its object to provide a novel method for stiffening passenger cars that does not require a roof structure, roll bar or the like.

Die Aufgabe wird erfindungsgemäß durch folgende Schritte gelöst:

  • A. Man beschichtet die Innenseite des Chassis, insbe­sondere der Bodengruppe mit einem saugfähigen, tex­tilen Werkstoff;
  • B. tränkt diesen Werkstoff mit einem fließfähigen Kunst­harz;
  • C. legt den getränkten Werkstoff unter Druckausübung formschlüssig an die innere Oberflächenstruktur des Chassis an und
  • D. läßt das Kunstharz im textilen Werkstoff unter Druck aushärten.
According to the invention, the object is achieved by the following steps:
  • A. Coating the inside of the chassis, especially the floor assembly, with an absorbent, textile material;
  • B. impregnates this material with a flowable synthetic resin;
  • C. applies the impregnated material to the inner surface structure of the chassis while applying pressure
  • D. lets the synthetic resin harden in the textile material under pressure.

Die nachstehende Beschriebung bevorzugter Ausführungs­formen der Erfindung dient im Zusammenhang mit beilie­gender Zeichnung der weiteren Erläuterung. Es zeigen:

  • Fig. 1 die beschichtete Innenseite eines Kraftfahrzeug-Chassis;
  • Fig. 2 eine Schnittansicht entlang der Linie 2-2;
  • Fig. 3 eine schaubildliche Ansicht eines Kabrioletts;
  • Fig. 4 schematisch die mit einer kunststoff­getränkten Werkstoffbahn beschichtete Innenseite eines Kraftfahrzeug-Chassis;
  • Fig. 5 eine Schnittansicht eines Hohlraums des Chassis und
  • Fig. 6 den ausgekleideten und versteiften Hohlraum.
The following description of preferred embodiments of the invention serves in conjunction with the accompanying drawing for further explanation. Show it:
  • 1 shows the coated inside of a motor vehicle chassis.
  • Figure 2 is a sectional view taken along line 2-2.
  • 3 is a perspective view of a convertible;
  • 4 schematically shows the inside of a motor vehicle chassis coated with a plastic-impregnated material web;
  • Fig. 5 is a sectional view of a cavity of the chassis and
  • Fig. 6 shows the lined and stiffened cavity.

In Fig. 1 ist schaubildlich die Innenseite eines me­tallischen Chassis 1, insbesondere der Bodengruppe 2 für einen Personenkraftwagen in Form eines Kabrioletts dargestellt. Die gesamte Innenseite ist, vgl. auch die Schnittansicht gemäß Fig. 2, mit einem versteifenden Belag 3 überzogen, der es ermöglicht, auf die sonst bei Personenkraftwagen vorgeschriebene Dachkonstruktion oder einen Überrollbügel zu verzichten.In Fig. 1, the inside of a metallic chassis 1, in particular the floor pan 2 for a passenger car is shown in the form of a convertible. The entire inside is, cf. also the sectional view according to FIG. 2, covered with a stiffening covering 3, which makes it possible to dispense with the roof construction or a roll bar otherwise prescribed for passenger cars.

Der Versteifungsbelag wird in folgender Weise aufge­bracht: Man beschichtet zunächst die - gegebenenfalls vorher entsprechend gereinigte - Innenseite des Chassis mit einem saugfähigen, textilen Werkstoff, bespiels­weise einem gewebten, gewirkten oder gestrickten Werk­stoff oder auch einem Vlies. Der textile Werkstoff kann aus Aramid-, Polyester-, Polyamid-, Kohle- und/oder Glasfaser bestehen, also insbesondere auch ein Gemisch solcher Fasern umfassen.The stiffening covering is applied in the following way: First, the inside of the chassis, which may have been cleaned beforehand, is coated with an absorbent, textile material, for example a woven, knitted or knitted material or a fleece. The textile material can consist of aramid, polyester, polyamide, carbon and / or glass fiber, that is to say in particular also comprise a mixture of such fibers.

Der zunächst lose in das Chassis eingefügte, vom Werk­stoff 4 gebildete Belag 3 wird anschließend mit einem fließfähigen, aushärtbaren Kunstharz getränkt. In Frage kommen Epoxid-, Polyester- oder Polyurethanharze.The covering 3, initially loosely inserted into the chassis and formed by the material 4, is then impregnated with a flowable, hardenable synthetic resin. Epoxy, polyester or polyurethane resins are suitable.

Der getränkte Textilwerkstoff wird hierauf unter Druck­ausübung formschlüssig an die innere Oberflächenstruk­tur des Chassis angepreßt, so daß er sich fest mit die­sem verbindet, wobei die Kunstharztränkung auch eine Verklebung des getränkten Textilwerkstoffes mit der Oberfläche des Chassis bewirken kann, die zu diesem Zweck entsprechend vorbereitet, insbesondere beschichtet sein kann.The impregnated textile material is then positively pressed onto the inner surface structure of the chassis while exerting pressure, so that it firmly connects to it, whereby the resin impregnation can also cause the impregnated textile material to bond to the surface of the chassis, which is prepared accordingly for this purpose, in particular can be coated.

Schließlich läßt man das Kunstharz im textilen Werkstoff unter Druck aushärten und versteift hierdurch das ge­samte Chassis.Finally, the synthetic resin in the textile material is allowed to harden under pressure, thereby stiffening the entire chassis.

Die Druckausübung auf den mit Kunstharz getränkten Werk­stoff erfolgt mit Vorteil in folgender Weise: Man füllt das insbesondere seitlich, im Türbereich entsprechend abgedichtete, mit dem mit Kunstharz getränkten, textilen Werkstoff innenseitig überzogene Chassis mit einer vorzugsweise wässrigen Aufschwemmung von Sand, Schlamm oder dergleichen und läßt auf die Oberseite dieser Auf­schwemmung mit Hilfe eines flächig ausgebildeten Druck­kissens einen Druck einwirken, wobei das Druckkissen auf seiner der Aufschwemmung gegenüberliegenden Seite von einem entsprechenden Rahmen abgestützt ist. Auf­grund des so erzeugten Druckes legt sich der kunstharz­getränkte Textilwerkstoff formschlüssig an die Ober­fläche des Chassis an. Die Aushärtung des Kunstharzes erfolgt vorzugsweise ebenfalls unter Druckausübung.The pressure exerted on the resin-impregnated material is advantageously carried out in the following manner: the chassis, in particular laterally sealed in the door area and filled with the resin-impregnated textile material on the inside, is filled with a preferably aqueous suspension of sand, mud or the like and left apply pressure to the top of this suspension by means of a flat pressure pad, the pressure pad being supported by a corresponding frame on its side opposite the suspension. Due to the pressure generated in this way, the synthetic resin-impregnated textile material fits positively on the surface of the chassis. The curing of the synthetic resin is preferably also carried out under pressure.

Um die Saugfähigkeit des textilen Werkstoffes gegenüber dem eingebrachten Kunstharz zu erhöhen , können die Fasern des Werkstoffes chemisch imprägniert werden.In order to increase the absorbency of the textile material compared to the synthetic resin, the fibers of the material can be chemically impregnated.

Die Tränkung, Druckausübung und Aushärtung des Kunst­harzes im textilen Werkstoff kann bei erhähter oder bei Raumtemperatur erfolgen, je nach Art des verwendeten Harzes.The impregnation, exertion of pressure and curing of the synthetic resin in the textile material can take place at elevated or at room temperature, depending on the type of resin used.

Um eine etwa auftretende Sprödigkeit im kunstharzge­tränkten, textilen Werkstoff zu vermeiden und diesen zu relaxieren, kann man das ausgehärtete Kunststoff im textilen Werkstoff bei erhöhter Temperatur tempern. Das beschriebene Verfahren eignet sich in erster Linie zur Versteifung von Kabrioletts, bei denen ein Überroll­bügel in Fortfall kommen soll. Generell ist das be­schriebene Verfahren jedoch für die Versteifung des Chassis bei allen Personenkraftwagen geeignet, wobei jedoch in erster Linie an solche ohne versteifende Dachkonstruktion gedacht ist, beispielsweise das in Fig. 3 dargestellte Kabriolett 5.In order to avoid any brittleness that may occur in the resin-soaked textile material and to relax it, the hardened plastic in the textile material can be tempered at elevated temperature. The method described is primarily suitable for stiffening convertibles in which a roll bar is to be eliminated. In general, however, the method described is suitable for stiffening the chassis in all passenger cars, although primarily those without a stiffening roof structure are intended, for example the convertible 5 shown in FIG. 3.

Bei bestimmter Ausbildung des Fahrwerks des zu ver­steifenden Kraftfahrzeugs, insbesondere bei langen oder hart gefederten Kraftfahrzeugen kann es vor­kommen, daß die mit dem harzgetränkten Werkstoff er­zielte Versteifung zu hart ist. In diesem Fall kann zwischen den harzgetränkten Werkstoff und das Chassis eine Zwischenschicht eingebracht werden, beispiels­weise auf folgende Weise:With a certain design of the chassis of the motor vehicle to be stiffened, in particular in the case of long or hard-sprung motor vehicles, it may happen that the stiffening achieved with the resin-impregnated material is too hard. In this case, an intermediate layer can be introduced between the resin-impregnated material and the chassis, for example in the following way:

Die Innenseite des Chassis wird vor Einbringen des textilen Werkstoffs mit einer Vlies- oder Filzschicht von 1 bis 2 mm Dicke ausgelegt. Danach wird der tex­tile Werkstoff aufgebracht und wie oben beschrieben weiterverfahren. Nach dem Aushärten des Kunstharzes wird der von dem textilen Werkstoff und dem Harz ge­bildete Belag entformt und aus dem Chassis heraus­genommen. Nach Entfernen der Vlies- oder Filzschicht wird, gegebenenfalls nach Aufbringung eines Haftunter­grundes auf den Versteifungsbelag und/oder die Chassis­innenseite ein Kleber eingebracht, welcher die Stelle der Vlies- oder Filzschicht einnimmt. Anschließend wird der mit Harz getränkte, textile Werkstoff wieder eingesetzt.The inside of the chassis is covered with a fleece or felt layer of 1 to 2 mm thickness before the textile material is introduced. The textile material is then applied and the process continues as described above. After the synthetic resin has hardened, the covering formed by the textile material and the resin is removed from the mold and removed from the chassis. After removal of the fleece or felt layer, an adhesive is introduced, optionally after applying an adhesive base to the stiffening covering and / or the inside of the chassis, which takes the place of the fleece or felt layer. The textile material soaked in resin is then used again.

Als Kleber kann man beispielsweise einen Polyurethan-­Kleber (Einkomponentenkleber) verwenden. Diesen Kleber wählt man je nach dem gewünschten Versteifungsgrad des Chassis aus, wobei man einen entsprechend elastischen und entsprechend weichen oder harten Kleber wählt. Hier­durch läßt sich der Versteifungsgrad in weiten Grenzen steuern.For example, a polyurethane adhesive (one-component adhesive) can be used as the adhesive. This adhesive is selected according to the desired degree of stiffening of the chassis, with an appropriately elastic and appropriately soft or hard adhesive being selected. This allows the degree of stiffening to be controlled within wide limits.

Das im voranstehenden beschriebene Verfahren eignet sich im wesentlichen für frei zutage liegende, leicht zugäng­liche Flächen des Chassis, insbesondere in der Boden­gruppe des Kraftfahrzeuges. Nachfolgend werden Verfahren beschrieben, die so ausgestaltet sind, daß sie sich auch für Hohlräume des Kraftfahrzeug-Chassis eignen, also ins­besondere für Hohlräume im Bereich des Schwellers, für A-, B- und C-Säulen im Türbereich, für Kardan-Tunnels und dergleichen.The method described above is essentially suitable for exposed, easily accessible surfaces of the chassis, in particular in the underbody of the motor vehicle. Methods are described below which are designed such that they are also suitable for cavities in the motor vehicle chassis, that is to say in particular for cavities in the area of the sill, for A, B and C pillars in the door area, for cardan tunnels and the like .

In Fig. 4 ist schaubildlich und schematisch die Innen­seite eines metallischen Chassis 11, insbesondere der Bodengruppe 12 für einen Personenkraftwagen in Form eines Kabrioletts dargestellt. Die gesamte Innenseite ist mit einer kunststoffgetränkten, versteifenden Werk­stoffbahn 13 überzogen.4 shows the inside of a metallic chassis 11, in particular the floor assembly 12 for a passenger car in the form of a convertible. The entire inside is covered with a plastic-impregnated, stiffening material web 13.

Wie dargestellt, weist das Chassis 11 Hohlräume, bei­spielsweise einen im wesentlichen horizontal und parallel zur Längsachse des Chassis verlaufenden Hohlraum 14 im Bereich des Schwellers, zwei etwa vertikal verlaufende Hohlräume 15 im Bereich der A-Säule sowie einen nach unten offenen Hohlraum 16 im Bereich des Kardan-Tunnels auf. Wei­tere solcher Hohlräume können auch an anderer Stelle, bei­spielsweise im Bereich von B- und C-Säulen vorgesehen sein. Diese Hohlräume sind an mindestens einer, vorzugsweise zwei Stirnseiten offen und somit von außen her zugänglich.As shown, the chassis 11 has cavities, for example a cavity 14 running essentially horizontally and parallel to the longitudinal axis of the chassis in the area of the rocker panel, two approximately vertical cavities 15 in the area of the A-pillar and a cavity 16 which is open at the bottom in the area of the Cardan tunnels on. Other such cavities can also be provided elsewhere, for example in the area of B and C pillars. These cavities are open on at least one, preferably two end faces and are therefore accessible from the outside.

Um auch derartige Hohlräume mit einer kunstharzgetränkten Werkstoffbahn auszukleiden und hierdurch das Chassis auch im Bereich dieser Hohlräume zu versteifen, geht man folgender­maßen vor: man tränkt eine auf die Länge des Hohlraums, bei spielsweise des Hohlraums 14 abgestimmte textile Werkstoff­bahn 17 mit aushärtbarem Kunstharz, rollt die Bahn entsprechend Figur 5 leicht ein, führt in das Innere der "Rolle" einen auf­blasbaren Ballon oder Schlauch 18 ein und bläst diesen Schlauch durch Verbindung mit einer Luftpumpe oder Druckluftquelle kräftig auf. Hierdurch entrollt sich die kunstharzgetränkte Werkstoffbahn 17 und legt sich unter Druck formschlüssig an die innenflächen des Hohlraumes 14 an. Man läßt hierauf das Kunstharz unter Druck aushärten und zieht anschließend den entspannten Schlauch 18 aus dem Hohlraum heraus. Der durch die kunstharzgetränkte Werkstoffbahn 17 ausgekleidete und versteifte Hohlraum 14 ist in Fig. 6 dargestellt.In order to line such cavities with a synthetic resin-impregnated material web and thereby stiffen the chassis in the area of these cavities, proceed as follows: one soaks a textile material web 17 matched to the length of the cavity, for example the cavity 14, with curable synthetic resin, which rolls Slightly insert the web according to FIG. 5, insert an inflatable balloon or tube 18 into the inside of the "roll" and inflate this tube vigorously by connection to an air pump or compressed air source. As a result, the synthetic resin-impregnated material web 17 unrolls and presses positively against the inner surfaces of the cavity 14. The synthetic resin is then allowed to harden under pressure and the relaxed tube 18 is then pulled out of the cavity. The cavity 14 lined and stiffened by the resin-impregnated material web 17 is shown in FIG. 6.

Dieses Verfahren läßt sich auf ringsum geschlossene Hohlräume, die an beiden Stirnseiten offen sind, wie beispielsweise der Hohlraum 14 im Schwellerbereich, anwenden. Auch nur an einer Stirnseite offene Hohlräume können auf diese Weise mit der Werkstoffbahn 17 ausgekleidet werden. Auch einseitig offene Hohlräume, wie beispielsweise der Kardan-Tunnel 16, können auf diese Weise inwendig ausgekleidet werden.This method can be applied to all around closed cavities that are open at both ends, such as the cavity 14 in the sill area. Cavities open only on one end face can be lined with the material web 17 in this way. Cavities open on one side, such as the cardan tunnel 16, can also be lined internally in this way.

Vor Vorteil ist es, wenn man zwischen die Werkstoffbahn 17 und den Schlauch 18 eine Trennfolie einlegt, weil sich dann der entspannte Schlauch nach Aushärtung des die Werkstoff­bahn imprägnierenden Kunststoffes leicht herausnehmen und wiederverwenden läßt.It is advantageous if a separating film is inserted between the material web 17 and the hose 18, because then the relaxed hose can be easily removed after the plastic impregnating the material web has hardened and can be reused.

In Figur 5 ist die Breite der Werkstoffbahn 17 so bemessen, daß die Kanten bündig aneinander liegen. Bei anderen Ausführungsformen können sich die Randbereiche der Werkstoffbahn 17 im auszuklei­denden Hohlraum auch ganz oder teilweise überlappen. Der Ver­steifungsgrad wird hierdurch nicht beeinträchtigt, sondern eher erhöht.In Figure 5, the width of the material web 17 is dimensioned such that the edges lie flush against one another. In other embodiments, the edge regions of the material web 17 in the cavity to be lined can also overlap completely or partially. This does not affect the degree of stiffening, but rather increases it.

In der Regel wird sich die kunststoffgetränkte Werkstoffbahn 17 mit Unebenheiten und dergleichen an der Innenseite des Hohl­raum 14 fest verhaften. Nötigenfalls kann vor Einbringen der Werkstoffbahn auch ein Kleber aufgebracht werden.As a rule, the plastic-impregnated material web 17 with bumps and the like will firmly adhere to the inside of the cavity 14. If necessary, an adhesive can also be applied before the material web is introduced.

Die textile Werkstoffbahn 17 kann aus Aramid-, Polyester-, Polyamid-, Kohle- und/oder Glasfasern bestehen. Sie kann ge­webt, gewirkt oder gestrickt sein. Die Fasern der textilen Werkstoffbahn können ferner zur Erhöhung ihrer Saugfähigkeit in Bezug auf den sie durchdringenden Kunststoff chemisch im­prägniert sein.The textile material web 17 can consist of aramid, polyester, polyamide, carbon and / or glass fibers. It can be woven, knitted or knitted. The fibers of the textile material web can also be chemically impregnated to increase their absorbency in relation to the plastic that penetrates them.

Als fließfähige Kunstharze, mit denen die Werkstoffbahn 17 ge­tränkt wird, kommen in erster Linie in Frage Epoxid-, Polyester- oder Polyurethanharze. Die Druckausübung mit Hilfe des Schlauches 18 auf die kunststoffgetränkte Werkstoffbahn 17 und/oder die Aushärtung des Kunststoffes kann bei Raumtem­peratur oder erhöhter Temperatur ausgeführt werden. Das aus­gehärtete Kunstharz kann anschließend auch bei erhöhter Tem­peratur getempert werden.The flowable synthetic resins with which the material web 17 is impregnated are primarily epoxy, polyester or polyurethane resins. The application of pressure with the aid of the hose 18 to the plastic-impregnated material web 17 and / or the curing of the plastic can be carried out at room temperature or at an elevated temperature. The hardened synthetic resin can then also be annealed at elevated temperature.

Bei einer anderen Ausführungsform der Erfindung kann man auf den aufblasbaren Schlauch 18 verzichten. Der Schlauch wird ersetzt durch eine Masse aus expandierendem Kunststoff, der während seiner Expansion die Werkstoffbahn 17 in gleicher Weise wie weiter oben der Schlauch 18 entrollt und unter Druck form­schlüssig an die Innenflächen des Hohlraums anpreßt. Vor Ein­füllung eines solchen expandierenden Kunststoffes in das Innere der noch eingerollten Werkstoffbahn 17 wird diese vorzugsweise mit einer Trennfolie ausgekleidet.In another embodiment of the invention, the inflatable tube 18 can be dispensed with. The hose will replaced by a mass of expanding plastic which, during its expansion, unrolls the material web 17 in the same manner as the hose 18 above and presses it positively against the inner surfaces of the cavity under pressure. Before such an expanding plastic is filled into the interior of the rolled-up material web 17, it is preferably lined with a separating film.

Als expandierender Kunststoff kommt in erster Linie ein Kunst­stoffschaum in Frage. Der Kunststoffschaum bleibt im Gegensatz zum Schlauch 18 im Innern der den Hohlraum auskleidenden Werk­stoffbahn enthalten.A plastic foam is primarily an expanding plastic. In contrast to the hose 18, the plastic foam remains inside the material web lining the cavity.

Im übrigen verläuft auch dieses Verfahren der Hohlraumver­steifung, insbesondere was die verwendeten Werkstoffe anbe­langt, ebenso wie das im Zusammenhang mit Fig. 1 bis 3 be­schriebene Verfahren.For the rest, this method of cavity stiffening, in particular as far as the materials used, is concerned, as is the method described in connection with FIGS.

Claims (15)

1. Verfahren zum Versteifen des metallischen Chassis, insbesondere der Bodengruppe von Personenkraftwagen, gekennzeichnet durch folgende Schritte: A. man beschichtet die Innenseite des Chassis, insbe­sondere der Bodengruppe mit einem saugfähigen, textilen Werkstoff; B. tränkt diesen Werkstoff mit einem fließfähigen Kunstharz; C. legt den getränkten Werkstoff unter Druckaus­übung formschlüssig an die innere Oberflächen­struktur des Chassis an und D. läßt das Kunstharz im textilen Werkstoff unter Druck aushärten. 1. Method for stiffening the metallic chassis, in particular the floor assembly of passenger cars, characterized by the following steps: A. you coat the inside of the chassis, especially the floor assembly, with an absorbent, textile material; B. impregnates this material with a flowable synthetic resin; C. applies the impregnated material to the inner surface structure of the chassis while applying pressure D. lets the synthetic resin harden in the textile material under pressure. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man einen textilen Werkstoff aus Aramid-, Polyester-, Polyamid-, Kohle-und/oder Glasfasern verwendet.2. The method according to claim 1, characterized in that one uses a textile material made of aramid, polyester, polyamide, carbon and / or glass fibers. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man einen gewebten, gewirkten oder gestrickten Werkstoff verwendet.3. The method according to claim 1, characterized in that one uses a woven, knitted or knitted material. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Fasern des textilen Werkstoffes zur Er­höhung ihrer Saugfähigkeit chemisch imprägniert.4. The method according to claim 1, characterized in that the fibers of the textile material are chemically impregnated to increase their absorbency. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man als fließfähiges Kunstharz Epoxid-, Polyester- ­oder Polyurethanharze verwendet.5. The method according to claim 1, characterized in that epoxy, polyester or polyurethane resins are used as the flowable synthetic resin. 6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Chassis mit einer Aufschwemmung von Sand, Schlamm oder dergleichen füllt und auf diese Auf­schwemmung mit einem Druckkissen einen Druck ausübt.6. The method according to claim 1, characterized in that one fills the chassis with a suspension of sand, mud or the like and exerts a pressure on this suspension with a pressure pad. 7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Tränkung, Druckausübung und Aushärtung bei Raumtemperatur ausführt.7. The method according to claim 1, characterized in that one carries out the impregnation, pressure and curing at room temperature. 8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das ausgehärtete Kunstharz bei erhöhter Tem­peratur tempert.8. The method according to claim 1, characterized in that one anneals the cured synthetic resin at elevated temperature. 9. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man zwischen dem beharzten, textilen Werkstoff und der Innenseite des Chassis einen Kleber anordnet.9. The method according to claim 1, characterized in that an adhesive is arranged between the resin-coated, textile material and the inside of the chassis. 10. Verfahren nach Anspruch 1, gekennzeichnet durch fol­gende Schritte: a. man führt die mit dem Kunststoff getränkte Werk­stoffbahn in teilweise eingerolltem Zustand sowie einen aufblasbaren Schlauch in einen Hohlraum des Chassis ein; b. man bläst den Schlauch auf, entrollt hierdurch die Werkstoffbahn und legt sie unter Druck formschlüssig an die Innenflächen des Hohlraums an; c. man zieht den entspannten Schlauch nach Aushärtung des Kunststoffes aus dem Hohlraum heraus. 10. The method according to claim 1, characterized by the following steps: a. one introduces the material web soaked in the plastic in a partially rolled-up state and an inflatable tube into a cavity of the chassis; b. the hose is inflated, thereby unrolling the material web and applying it under pressure to the inner surfaces of the cavity; c. the relaxed hose is pulled out of the cavity after the plastic has hardened. 11. Verfahren nach Anspruch 1, gekennzeichnet durch folgende Schritte: a. man führt die mit dem Kunststoff getränkte Werkstoff­bahn in teilweise eingerolltem Zustand zusammen mit einem expandierbaren Kunstharz in den Hohlraum des Chassis ein; b. man bringt den expandierenden Kunststoff zur Expansion; c. man entrollt hierdurch die Werkstoffbahn und legt sie unter Druck formschlüssig an die Innenflächen des Hohlraums an. 11. The method according to claim 1, characterized by the following steps: a. one introduces the partially impregnated sheet of material soaked in the plastic together with an expandable synthetic resin into the cavity of the chassis; b. the expanding plastic is brought to expansion; c. this unrolls the material web and press-fits it to the inner surfaces of the cavity in a form-fitting manner. 12. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß man zwischen Werkstoffbahn und Schlauch eine Trennfolie einlegt.12. The method according to claim 10, characterized in that a separating film is inserted between the material web and the hose. 13. Verfahren nach Anspruch 10 oder 11, dadurch gekennzeich­net, daß man die Werkstoffbahn so bemißt, daß sich ihre Ränder im Hohlraum ganz oder teilweise überlappen.13. The method according to claim 10 or 11, characterized in that the material web is dimensioned so that its edges overlap in whole or in part in the cavity. 14. Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß man das Innere der eingerollten Werkstoffbahn vor Ein­füllung des expandierenden Kunststoffes mit einer Trenn­folie auskleidet.14. The method according to claim 11, characterized in that the interior of the rolled-up material web is lined with a separating film before filling the expanding plastic. 15. Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß man als expandierenden Kunststoff einen Kunststoff­schaum verwendet.15. The method according to claim 11, characterized in that a plastic foam is used as the expanding plastic.
EP88105903A 1987-04-18 1988-04-13 Method of stiffening a chassis made of metal, especially the bodywork of a private car Expired - Lifetime EP0287941B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105903T ATE70792T1 (en) 1987-04-18 1988-04-13 METHOD OF REINFORCING THE METALLIC CHASSIS, ESPECIALLY THE FLOOR STRUCTURE OF PASSENGER CARS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19873713302 DE3713302A1 (en) 1987-04-18 1987-04-18 Method for reinforcing the metallic chassis, in particular of the body platform of passenger vehicles
DE3713302 1987-04-18
DE3728757 1987-08-28
DE19873728757 DE3728757A1 (en) 1987-04-18 1987-08-28 METHOD FOR REINFORCING METAL VEHICLE CHASSIS

Publications (2)

Publication Number Publication Date
EP0287941A1 true EP0287941A1 (en) 1988-10-26
EP0287941B1 EP0287941B1 (en) 1991-12-27

Family

ID=25854802

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88903789A Pending EP0357651A1 (en) 1987-04-18 1988-04-13 Process for reinforcing the metallic chassis, in particular the underbody, of a passenger car
EP88105903A Expired - Lifetime EP0287941B1 (en) 1987-04-18 1988-04-13 Method of stiffening a chassis made of metal, especially the bodywork of a private car

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP88903789A Pending EP0357651A1 (en) 1987-04-18 1988-04-13 Process for reinforcing the metallic chassis, in particular the underbody, of a passenger car

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EP (2) EP0357651A1 (en)
JP (1) JPH0659842B2 (en)
AT (1) ATE70792T1 (en)
DE (2) DE3728757A1 (en)
ES (1) ES2027723T3 (en)
GR (1) GR3003478T3 (en)
WO (1) WO1988007954A1 (en)

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WO1995034446A1 (en) * 1994-06-10 1995-12-21 Stankiewicz Gmbh Loading area lining with integral soundproofing
WO1999042352A2 (en) * 1998-02-20 1999-08-26 Mipo Chemicals Co., Ltd. Aluminium chassis having heat insulating foam filled in opening portion, its manufacturing method and apparatus
FR2923794A1 (en) * 2007-11-19 2009-05-22 Renault Sas STRUCTURE OF MOTOR VEHICLE

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DE3922351A1 (en) * 1989-07-07 1991-01-10 Jt Elektronik Gmbh METHOD FOR REFURBISHING DRAIN PIPES USING A RESINATED INTERNAL PIPE
DE19621782A1 (en) * 1996-05-30 1997-12-04 Odenwald Chemie Gmbh Foam spacer made of e.g. polyurethane with impermeable outer coating
DE19638904A1 (en) * 1996-09-23 1998-03-26 Bayerische Motoren Werke Ag Process for producing a hollow beam for vehicle bodies
DE102005061506B4 (en) * 2005-12-22 2016-03-10 Audi Ag Structural part for a vehicle
JP4784425B2 (en) * 2006-07-28 2011-10-05 トヨタ自動車株式会社 Lower body structure and manufacturing method thereof
JP5959558B2 (en) * 2014-03-13 2016-08-02 アイシン高丘株式会社 Composite structure and method for producing the same
ES2724003T3 (en) * 2015-09-03 2019-09-05 Evonik Degussa Gmbh Hybrid component part with a local reinforcement based on a two-stage cross-linked fibrous composite material based on polyurethane

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Also Published As

Publication number Publication date
WO1988007954A1 (en) 1988-10-20
JPH0659842B2 (en) 1994-08-10
ATE70792T1 (en) 1992-01-15
EP0357651A1 (en) 1990-03-14
DE3728757A1 (en) 1989-03-09
GR3003478T3 (en) 1993-02-17
EP0287941B1 (en) 1991-12-27
DE3867115D1 (en) 1992-02-06
ES2027723T3 (en) 1992-06-16
JPH02503080A (en) 1990-09-27

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